from BBC News - World http://ift.tt/2gvjXOg
Wednesday, October 11, 2017
Asteroid close approach to test warning systems
A house-sized asteroid is set to pass close to the Earth allowing scientists to rehearse future strike threats.
from BBC News - World http://ift.tt/2gvjXOg
from BBC News - World http://ift.tt/2gvjXOg
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